It is obvious to me Sheldon that your family is attempting to distant themselves from you because of your culinary expertise. Perhaps some of the female members of your family feel threatened because of your abilities in a field that has always been considered feminine.
I would suggest that rather than feeling slighted by them, you should feel proud in that it really is a backhanded compliment of your cooking talents.
Perhaps you can calm their fears by offering to teach them your skills, thus demonstrating to them you are not a threat.
Or maybe deep down inside Sheldon, you harbor feelings of resentment to some of the female members of your family and this is your way of getting back at them by showing them up in the kitchen. Although your real feelings are veiled by this shallow attempt to participate in a family function, often times it is difficult for our real feelings to not surface and be detected by those we resent.
A complete self examination of your motivation factors may be in order here Sheldon.